MemTest86 is the de-facto standard
for testing the physical RAM.
It runs from a USB stick or CD and starts automatically
is available for free or in commercial editions (never tried these)
Test your RAM before testing anything else. A hardware driver for anything else may fail due to faulty RAM.
Unreliable RAM can cause a multitude of problems. ...
Exact file looks like a program that will do what you need to do. You have to set it up to scan a folder but you could just set it up to scan the folder c or whatever drive you are scanning.
A file integrity verification tool:
Use it to make sure files copied to CD-ROM are bit-perfect copies,
Use it to make sure backups copied from one ...